The problem is, showing that a trait has evolved because it enhances fire is difficult.

问题在于，证明某项特性因其助燃而进化产生很困难。

youdao

The union obtained figures from last September showing that a third of the 120, 000 young people in England with no qualifications, had abandoned education and also failed to find work.

该联合会从去年九月就开始对十二万的英国年轻人进行跟踪调查，发现有三分之一的年轻人没有生存技能，他们放弃了教育机会，也没有工作光顾他们。

youdao

She had a warm woollen hat on that left only her eyes and nose showing.

她戴了一顶保暖呢帽，只露出眼睛和鼻子。

《牛津词典》

Some people criticize his art for only showing a false or very limited image of America, one that is white and middle-class.

VOA: special.2010.09.20

So, the father gets a Nobel Prize for showing that an electron is a particle, and the son says, well, what can I do to top that?

他的父亲因为发现电子是粒子,而拿到了诺贝尔奖，那么儿子说，好，我能做些什么超越父亲的发现呢？

麻省理工公开课 - 化学原理课程节选

The reason I'm showing you this is it that this is a gain, a common trade off in computer science.

我向你们说明这个,是因为是这个计算机科学中。

麻省理工公开课 - 计算机科学及编程导论课程节选

She cites research showing that a fifth of students at public universities are black or pardo.

ECONOMIST: Race in Brazil

Scientists have uncovered evidence showing that a gamma ray burst may have irradiated the Earth over 1200 years ago.

FORBES: A Gamma Ray Burst May Have Irradiated 8th Century Earth

We ran a regression showing that a mere four months ago, the correlation between ICON and these retailers was .55.

FORBES: William and Mary's Iconic Stock Pitch